45405881 has 4 divisors (see below), whose sum is σ = 45459600. Its totient is φ = 45352164.

The previous prime is 45405821. The next prime is 45405889. The reversal of 45405881 is 18850454.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45405881 - 2⁶ = 45405817 is a prime.

It is a super-2 number, since 2×45405881² = 4123388058772322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45405889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25571 + ... + 27288.

It is an arithmetic number, because the mean of its divisors is an integer number (11364900).

Almost surely, 2^45405881 is an apocalyptic number.

It is an amenable number.

45405881 is a deficient number, since it is larger than the sum of its proper divisors (53719).

45405881 is an equidigital number, since it uses as much as digits as its factorization.

45405881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53718.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 45405881 is about 6738.3886055941. The cubic root of 45405881 is about 356.7555205107.

The spelling of 45405881 in words is "forty-five million, four hundred five thousand, eight hundred eighty-one".